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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Sperm production






2. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






3. Urinary calculi.






4. Sperm production






5. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






6. 30-38 hours after estrus cycle begins






7. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






8. Failure to have both testis (gonads) descend






9. 30 hours after estrus begins






10. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






11. Scar tissue plugs up chambers of udder






12. 265-285 days






13. 30 hours after estrus begins






14. Duct through penis that carries sperm and urine






15. 283 days






16. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






17. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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18. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






19. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






20. 16-20 hours






21. 147 days






22. Why does estrus happen before ovulation?






23. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






24. 265-285 days






25. Help to signal hormone levels which we need both in the brain right next to each other.






26. Look for infection - split - and rupture of the penis






27. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






28. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






29. Microscopic - make sure not sterile - very few bulls are actually tested






30. 26 hours after estrus begins






31. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






32. Milk ~305 days - dry 60 days prior to calving






33. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






34. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






35. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






36. Check feet and legs - look for masculine traits in build such as crest and muscling






37. When are steers and heifers weaned from bottle feeding?






38. Provide nourishment for the developing sperm






39. (male) pushes the testes outward toward the legs for a cool-down off of the body






40. 19-23 (21) days






41. 10-37 (21) days






42. Animal which has been castrated after puberty






43. (switzerland) 2nd in size and milk production - most muscle -






44. Animal which has been castrated after puberty






45. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






46. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






47. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






48. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






49. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






50. What helps regulate spermatogenesis?